Its depending on the mare's color before it turned gray! And on
the dominant genes. But these colors can be possible:
- Chestnut/Sorrel/Red Mare (Before it turned gray)
50% Chestnut that goes gray
50% Chestnut that stays chestnut
- Bay mare (Before it turned gray)
29.17% Gray out of bay
29.17% Bay
16.67% Gray out of chestnut
16.67% Chestnut
4.17% Gray out of Black
4.17% Black
- Black Mare (Before it turned gray)
16.67% Gray out of Black
16.67% Gray out of Bay
16.67% Black
16.67% Bay
16.67% Gray out of chestnut
16.67% Chestnut